Mechanical pencil



B. B. GOLDSNIITH MECHANICAL PENCIL Filed April 2l. 192! lf'fatentedduly l, i924.,

unir etree BYRON B. GOLDSMTH, F NEW YORK, N. Y.

MECHANICAL PENCIL.

Application filed April 21, 1921. Serial No. 463,248.

T0 all whom t may concern Be it known that I, BYRON B. GOLDSMITH,

a citizen of the VUnited States, residing in New York, county and State of New York,

have invented aI certain lmprovement in Mechanical Pencils, of which the following is a specification.

The present invention relates to that class of mechanically operated pencils in which the leads are inserted within an external casing, usually of metal, and are gradually pushed forward by suitable mechanism, in

proportion as the points are worn away in writing.

The structure which forms the subject matter hereof is illustrated in two preferred modifications in the accompanying drawings, wherein Figure l is a view principally in longitudinal section of one modification, Figure 2 is a cross sectional view on 2--2 in Figure l, Figure 3 is a view partly in longitudinal section of another modification, and Figure 4 is a similar view of the rev- -oluble shell used in the form shown in Figure 3.

Referring to Figures l and 2, the outer' casing. forming the bodv of the nenni] is the wing (here a curved wire) projects. rllhe cup may be soldered or otherwise fixed in place.

lt is clearthat, by turning the point ll one way or the other in its mounting, the screw 13 will cause the nut to move up or down as the case may be. The nut 16 (and therefore the pusher 18) having been screwed back, a lead may be pushed into place from the front end of the pencil, after which it can be gradually pressed down as required by merely turning the point 11.

In the form shown in Figures 3 and 4, the same principle of construction is adopted, but, instead of using a revoluble point l1,

with a fixed jaw, the jaw is made revoluble, while the point remains fixed. The wing and nut are thus revolved upon the screw.

For this purpose, a thin metal shell 2l 70 is fitted into the top of the casing 10, being preferably held in place by a beading 22 permitting the shell to be revolved by grasping its top, which is slightly expanded, as at 23, to come flush with the outer surface of For this purpose, a thin metal shell 21 is formed with a slot or jaw 24 through which the. wine* nrner-.ts empl 1w mmm@ m@ a Wire extending backward from said nut and bent so as to enter the rear end of the container' to connect the nut and pusher. 10

ln testimony whereof I have hereto set my hand on this 18th day ol April, 1921.

BYRON B; GOLDSMITH. 

